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相关论文: Semi-Analytic Galaxy Evolution (SAGE): Model Calib…

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The Galform semi-analytic model of galaxy formation is used to explore the mechanisms primarily responsible for the three types of galaxies seen in the local universe: bulge, bulge+disk and disk, identified with the visual morphological…

宇宙学与河外天体物理 · 物理学 2015-05-14 Andrew J. Benson , Nick Devereux

We present a multi-epoch analysis of the galaxy populations formed within the cosmological hydrodynamical simulations presented in Vogelsberger et al. (2013). These simulations explore the performance of a recently implemented feedback…

宇宙学与河外天体物理 · 物理学 2015-06-16 Paul Torrey , Mark Vogelsberger , Shy Genel , Debora Sijacki , Volker Springel , Lars Hernquist

There is now compelling evidence in favour of the hierarchical structure formation paradigm. Semi-analytic modelling is a powerful tool which allows the formation and evolution of galaxies to be followed in a hierarchical framework. We…

天体物理学 · 物理学 2007-05-23 C. M. Baugh , A. J. Benson , S. Cole , C. S. Frenk , C. G. Lacey

Empirical models often rely on key relations from the galaxy--halo connection to construct mock galaxy catalogues. These relations typically describe central galaxies more accurately than satellite galaxies, which are generally less massive…

We present a semi-analytic model for the thermal and ionization history of the universe at 1000 >~ z >~ 3. This model incorporates much of the essential physics included in full-scale hydrodynamical simulations, such as (1) gravitational…

天体物理学 · 物理学 2009-10-31 Weihsueh A. Chiu , Jeremiah P. Ostriker

We study the behaviour of multiple radiative cooling algorithms implemented in seven Semi-Analytic Models (SAMs) of galaxy formation, including a new model we propose in this paper. We use versions of the models without feedback and apply…

宇宙学与河外天体物理 · 物理学 2011-09-29 Yu Lu , Dušan Kereš , Neal Katz , H. J. Mo , Mark Fardal , Martin D. Weinberg

The high redshift observations of galaxies now becoming available from the Hubble Space Telescope and from large ground based telescopes are opening fresh windows on galaxy formation. Semianalytic models of galaxy formation provide us with…

天体物理学 · 物理学 2007-05-23 C. M. Baugh , C. G. Lacey , S. Cole , C. S. Frenk

We present a variation of the recently updated Munich semi-analytical galaxy formation model, L-Galaxies, with a new gas stripping method. Extending earlier work, we directly measure the local environmental properties of galaxies to…

星系天体物理 · 物理学 2021-05-12 Mohammadreza Ayromlou , Guinevere Kauffmann , Robert M. Yates , Dylan Nelson , Simon D. M. White

Using N-body simulations and galaxy formation models, we study the galaxy stellar mass correlation and the two-point auto-correlation. The simulations are run with cosmological parameters from the WMAP first, third and seven year results,…

宇宙学与河外天体物理 · 物理学 2015-06-04 X. Kang , M. Li , W. P. Lin , P. J. Elahi

We present the calibration of stellar and active galactic nucleus (AGN) feedback in the subgrid model for the new COLIBRE hydrodynamical simulations of galaxy formation. COLIBRE directly simulates the multi-phase interstellar medium and the…

We apply the spectral energy distribution (SED) fitting code ProSpect to multiwavelength imaging for $\sim$7,000 galaxies from the GAMA survey at $z<0.06$, in order to extract their star formation histories. We combine a parametric…

Numerical simulations have become a necessary tool to describe the complex interactions among the different processes involved in galaxy formation and evolution, unfeasible via an analytic approach. The last decade has seen a great effort…

星系天体物理 · 物理学 2017-07-19 Alessandro Lupi , Marta Volonteri , Joseph Silk

We employ several galaxy formation models, in particular, L-GALAXIES, IllustrisTNG, and EAGLE, as well as observational samples from SDSS and DESI, to investigate galactic conformity, the observed large-scale correlation between the…

星系天体物理 · 物理学 2022-12-21 Mohammadreza Ayromlou , Guinevere Kauffmann , Abhijeet Anand , Simon D. M. White

We analyze the total and baryonic acceleration profiles of a set of well-resolved galaxies identified in the EAGLE suite of hydrodynamic simulations. Our runs start from the same initial conditions but adopt different prescriptions for…

We use the {\sc Illustris TNG300} magneto-hydrodynamic simulation, the {\sc SAGE} semi-analytical model, and the subhalo abundance matching technique (SHAM) to examine the diversity in predictions for galaxy assembly bias (i.e. the…

星系天体物理 · 物理学 2021-05-12 Sergio Contreras , Raul Angulo , Matteo Zennaro

We implement physically motivated recipes for partitioning cold gas into different phases (atomic, molecular, and ionized) in galaxies within semi-analytic models of galaxy formation based on cosmological merger trees. We then model the…

星系天体物理 · 物理学 2015-09-30 Rachel S. Somerville , Gergö Popping , Scott C. Trager

We develop a semi-analytic model of hierarchical galaxy formation with an improved treatment of the evolution of galaxies inside dark matter haloes. We take into account not only dynamical friction processes building up the central dominant…

天体物理学 · 物理学 2009-11-07 N. Menci , A. Cavaliere , A. Fontana , E. Giallongo , F. Poli

Increasingly, uncertainties in predictions from galaxy formation simulations (at sub-Milky Way masses) are dominated by uncertainties in stellar evolution inputs. In this paper, we present the full set of updates from the FIRE-2 version of…

We study the co-evolution of dark matter halos, galaxies and supermassive black holes using an empirical galaxy evolution model from $z=0$ -- $10$. We demonstrate that by connecting dark matter structure evolution with simple empirical…

星系天体物理 · 物理学 2024-12-20 Christopher Boettner , Maxime Trebitsch , Pratika Dayal

We present a model for the dynamical evolution of subhaloes based on an approach combining numerical and analytical methods. Our method is based on tracking subhaloes in an N-body simulation up to the last point that it can be resolved, and…

星系天体物理 · 物理学 2017-09-20 Vimal Simha , Shaun Cole